DNA polymerases need a primer oligonucleotide (RNA or DNA) - their substrates are an existing 3'-OH group and a dNTP. The primase however is a typical RNA polymerase, capable of initiating polynucleotide synthesis de novo by positioning a complementary ribonucleoside 5'-triphosphate opposite its complementary DNA base.
Alison Schapker. Alison Schapker is an American television writer and producer. She is well known for her work on the ABC espionage series Alias and for the FOX science-fiction series Fringe.
Julie Chen (I) Chen began filling in as news anchor for The CBS Morning News (1987) and This Morning (1988) in June 1999. Before that, she was a reporter and anchor for WCBS-TV, the CBS station in New York (1997-99). She also was a reporter for WDTN-TV Dayton (1995-97). Chen was a producer for ABC NewsOne, that network's affiliate news service (1991-95).